What happens to the elements in an array-based queue after a dequeue operation?
The array is resized to accommodate the removal of the element.
The dequeued element is marked as deleted but remains in the array.
The 'front' pointer is adjusted to point to the next element in the queue, effectively removing the first element logically.
The remaining elements are shifted one position towards the front of the array.
What value does the 'isEmpty' operation on a queue return if the queue contains no elements?
The first element in the queue
0
-1
True
How do you efficiently handle the situation where the array representing the queue becomes full?
Stop accepting new elements.
Delete the oldest element.
Resize the array to accommodate more elements.
Use a linked list instead of an array.
If a queue is implemented using a fixed-size array, what condition leads to a 'queue overflow' situation?
Trying to add an element to a full queue.
Trying to remove an element from an empty queue.
Trying to sort the elements in the queue.
Trying to access an element beyond the queue's capacity.
What is the purpose of the 'front' pointer in an array implementation of a queue?
It tracks the total number of elements in the queue.
It points to the most recently added element.
It points to the next available empty location.
It points to the element that has been in the queue the longest.
What is the main advantage of using a circular array for implementing a queue compared to a regular array?
Efficient utilization of space after multiple enqueue and dequeue operations
Better handling of sorted data
Reduced memory consumption
Faster access to individual elements
What is the worst-case time complexity of searching for an element in a queue implemented using a linked list?
O(1)
O(log n)
O(n log n)
O(n)
In which of these scenarios is a queue data structure a suitable choice?
Handling requests in a multi-threaded environment based on their arrival order.
Managing function calls in a recursive program.
Implementing an undo/redo functionality in a text editor.
Storing a list of recently opened files in an operating system.
What is the role of the 'front' pointer in a queue data structure?
It keeps track of the total number of elements in the queue.
It determines if the queue is full or not.
It points to the location where the next element will be added.
If you were to design a system to handle customer service requests arriving through various channels, with each request needing to be addressed in the order it was received, which data structure would be most appropriate?
Queue
Binary Search Tree
Heap
Graph